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//go:build !windows
package jsoncolor
import (
"io"
"os"
"golang.org/x/term"
)
// IsColorTerminal returns true if w is a colorable terminal.
// It respects [NO_COLOR], [FORCE_COLOR] and TERM=dumb environment variables.
//
// [NO_COLOR]: https://no-color.org/
// [FORCE_COLOR]: https://force-color.org/
func IsColorTerminal(w io.Writer) bool {
if os.Getenv("NO_COLOR") != "" {
return false
}
if os.Getenv("FORCE_COLOR") != "" {
return true
}
if os.Getenv("TERM") == "dumb" {
return false
}
if w == nil {
return false
}
f, ok := w.(*os.File)
if !ok {
return false
}
if !term.IsTerminal(int(f.Fd())) {
return false
}
return true
}
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